High-Directivity, Compact, Omnidirectional Horizontally Polarized Antenna Array

Abstract

Omnidirectional horizontally polarized (OHP) X-band magnetic dipole antenna arrays are reported that simultaneously achieve high directivity and wide bandwidth while being compact in size. A major innovation is the seamless integration of several phase inverters into an electrically long TE 0.5,0 mode open waveguide. The resulting open structure radiates as a collinear series of magnetic dipole sections. The inverters facilitate the realization of in-phase electric fields along its entire length and, hence, phase coherence between all of these magnetic dipoles. Each phase inverter is realized as a combination of a meandering slot on one metallic surface of the waveguide and several shorting vias surrounding it. Two such multi-staged (sixand eight-element) collinear OHP magnetic dipole arrays were designed and optimized. Prototypes of both were fabricated with standard, low-cost PCB manufacturing technology. The volume of the six-element (eight-element) OHP array is only 0.07 × 0.22 × 3.3 𝝀𝝀 𝟎𝟎 𝟑𝟑 (0.07 × 0.22 × 4.3 𝝀𝝀 𝟎𝟎 𝟑𝟑 ); it achieves a measured 8.2 dBi (10.4 dBi) peak realized gain. The measured overlapping -10-dB impedance and 3-dB realized gain bandwidth was 8% in both cases. These designs are ideal for wireless applications requiring thin high directivity HP sources covering the entire azimuthal plane.

Análisis de los efectos electromagnéticos de la integración de un arreglo de antena de 4 elementos con la estructura de un teléfono para bandas milimétricas

“…En bandas mmW, las perdidas producidas para transportar la energía RF desde los módems hasta las antenas en los teléfonos inalámbricos llega a valores importantes (Pan et al, 2012). Es así, que se usan diseños de antena que usen la superficie de empaquetado de los módems, como los que se presentan en (Lin & Ziolkowski, 2020), (Sun, 2018), (Zhang & Liu, 2009). Estos diseños usan diferentes las capas de cobre apiladas una encima de otra empleando técnica de acoplamiento por apertura.…”

“…Sin embargo, esta ventaja trae limitaciones relacionadas al alcance del enlace inalámbrico, ya que las perdidas de espacio libre se hacen demasiado considerables (Farooq & Rather,2019). Para compensar esta desventaja se usan arreglos de antena para multiplicar la ganancia de las antenas y así compensar las perdidas de trayecto (Lin & Ziolkowski, 2020). Es así que, se presenta el diseño de un arreglo de 4x1 antenas que opera en el rango 26 GHz a 28 GHz para teléfonos con modem 5G.…”

A Sidelobe Suppressed Huygens Dipole Array with High Aperture Efficiency

“…The OMD array consists of four half-wavelength long sections and is fabricated from a single piece of copper-clad 1.58 mm thick Rogers Duroid TM 5880 substrate, whose relative permittivity and loss tangent are 2.2 and 0.0009, respectively. Details of the OMD array design concept are found in our previously reported work [11]. Two metallic dipole plates are connected directly to the edges of the waveguide aperture and are orthogonal to its vertical walls.…”

Simulations on the effects of an optimized bowtie dipole antenna with an adaptive FIR filter

“…These forms of signals vary in their functions and purposes, and they also vary in their frequencies. Some TV channels make use of frequencies in the ultra high frequency (UHF) range, cellphones make use of frequencies in the UHF range as well, and radar makes use of frequencies in the UHF range too [3]- [5]. The UHF range has a variety of purposes [6] and radio makes use of frequencies in either the low frequency (LF), medium frequency (MF), or high frequency (HF) range for shortwave, AM radio, FM radio [7].…”